312212311132243 has 4 divisors (see below), whose sum is σ = 328644538033960. Its totient is φ = 295780084230528.

The previous prime is 312212311132237. The next prime is 312212311132247. The reversal of 312212311132243 is 342231113212213.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 312212311132243 - 2⁴⁵ = 277027939043411 is a prime.

It is a super-2 number, since 2×312212311132243² (a number of 30 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (312212311132247) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8216113450830 + ... + 8216113450867.

It is an arithmetic number, because the mean of its divisors is an integer number (82161134508490).

Almost surely, 2^{312212311132243} is an apocalyptic number.

312212311132243 is a deficient number, since it is larger than the sum of its proper divisors (16432226901717).

312212311132243 is a wasteful number, since it uses less digits than its factorization.

312212311132243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16432226901716.

The product of its digits is 10368, while the sum is 31.

Adding to 312212311132243 its reverse (342231113212213), we get a palindrome (654443424344456).

The spelling of 312212311132243 in words is "three hundred twelve trillion, two hundred twelve billion, three hundred eleven million, one hundred thirty-two thousand, two hundred forty-three".